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Decoupled electron and phonon transports in hexagonal boron nitride-silicene bilayer heterostructure.
- Source :
-
Journal of Applied Physics . 2/14/2016, Vol. 119 Issue 6, p1-6. 6p. 3 Color Photographs, 2 Charts, 2 Graphs. - Publication Year :
- 2016
-
Abstract
- Calculations based on the density functional theory and empirical molecular dynamics are performed to investigate interlayer interaction, electronic structure and thermal transport of a bilayer heterostructure consisting of silicene and hexagonal boron nitride (h-BN). In this heterostructure, the two layers are found to interact weakly via a non-covalent binding. As a result, the Dirac cone of silicene is preserved with the Dirac cone point being located exactly at the Fermi level, and only a small amount of electrons are transferred from h-BN to silicene, suggesting that silicene dominates the electronic transport. Molecular dynamics calculation results demonstrate that the heat current along h-BN is six times of that along silicene, suggesting that h-BN dominates the thermal transport. This decoupled role of h-BN and silicene in thermal and electronic transport suggests that the BN-silicene bilayer heterostructure is promising for thermoelectric applications. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ELECTRON research
*PHONONS
*BORON
*HETEROSTRUCTURES
*SUPERLATTICES
Subjects
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 119
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 112950522
- Full Text :
- https://doi.org/10.1063/1.4941534